BACKGROUND:Exor is Smithy's Giant Sword that crashed into Bowser's Keep, allowing the Smithy Gang to enter the Mushroom World and take over Bowser's Keep. Exor also destroyed the bridge so nobody could get to the Keep.
Exor seemed to have a hypnotic power over Bowser's Minions, and he is believed to have shattered the Star Road. He's probably the second-largest weapon in the Smithy Gang after the Blade.

OTHER BACKGROUND INFO:"At long last you cross swords with the giant invader that fell into Bowser's Keep. Exor, the skull-like mask on top the sword's handle, is defended by the Left Eye, Right Eye and the mouth, which for some inscrutable reason is named Neosquid. Approach the four foes methodically. Attack one evil eye, then the other, and then the Neosquid. An eye showing spirals is out of commission, but can revive temporarily. Once stripped of all defenders, Exor is actually quite vulnerable." - SMRPG Player's Guide

QUOTES:"Halt! Who goes there? A trespasser! This castle now belongs to us, the 'Smithy Gang'. It's our first step towards taking over this world! And if it weren't for nosey characters like YOU...We'd practically OWN this world! So let's see you deal with THIS!" (creates an earthquake knocking down the bridge to Bowser's Keep).
"I'm so utterly alone..." - Neosquid
"I can't see a thing." - Left Eye
"I've got an astigmatism!" - Right Eye
"Gotta mow the Lawn Soon." - Exor